EP 1187390 A1 20020313 - INFORMATION PROCESSING SYSTEM AND METHOD
Title (en)
INFORMATION PROCESSING SYSTEM AND METHOD
Title (de)
VORRICHTUNG UND VERFAHREN ZUR INFORMATIONSVERARBEITUNG
Title (fr)
SYSTEME ET PROCEDE DE TRAITEMENT D'INFORMATIONS
Publication
Application
Priority
- JP 0102866 W 20010402
- JP 2000105329 A 20000406
- JP 2000179695 A 20000615
Abstract (en)
A content key, an authentication key, and a program data etc. are transmitted with an enabling key block (EKB) in an encrypted key constitution of a tree structure. The EKB has a constitution in which a device as a leaf of the tree holds a leaf key and a limited node key, and a specific enabling key block (EKB) is generated and distributed to a group specified by a specific node to limit devices that can be renewed. As the devices that do not belong to the group cannot perform decryption, the security for distributing keys etc. can be secured. Thus, distribution of various kinds of keys or data is executed in an encryption key constitution of a tree structure to realize an information processing system and method enabling to distribute data efficiently and safely. <IMAGE>
IPC 1-7
IPC 8 full level
G06F 12/14 (2006.01); H04L 9/00 (2006.01); G06F 1/00 (2006.01); G06F 21/10 (2013.01); G06F 21/62 (2013.01); G11B 20/00 (2006.01); G11B 20/10 (2006.01); G11B 20/12 (2006.01); H04L 9/08 (2006.01)
CPC (source: EP KR US)
G06F 21/107 (2023.08 - EP); G06F 21/1076 (2023.08 - EP); G06F 21/109 (2023.08 - EP); G11B 20/00086 (2013.01 - EP US); G11B 20/0021 (2013.01 - EP US); G11B 20/00253 (2013.01 - EP US); G11B 20/00536 (2013.01 - EP US); H04L 9/08 (2013.01 - KR); H04L 9/0836 (2013.01 - EP US); H04L 9/0891 (2013.01 - EP US); G06F 21/107 (2023.08 - US); G06F 21/1076 (2023.08 - US); G06F 21/109 (2023.08 - US); G06F 2221/2107 (2013.01 - EP US); G06F 2221/2109 (2013.01 - EP US); H04L 2209/60 (2013.01 - EP US); Y04S 40/20 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1187390 A1 20020313; EP 1187390 A4 20030507; EP 1187390 B1 20070228; AT E355671 T1 20060315; AU 4470901 A 20011023; AU 780325 B2 20050317; AU 780325 C 20060302; CN 100417064 C 20080903; CN 1383644 A 20021204; DE 60126874 D1 20070412; DE 60126874 T2 20071031; HK 1052417 A1 20030911; JP 2001352321 A 20011221; KR 100746880 B1 20070807; KR 20020026284 A 20020409; MX PA01012518 A 20020702; NO 20015908 D0 20011203; NO 20015908 L 20020205; NO 332239 B1 20120806; TW 518871 B 20030121; US 2002136411 A1 20020926; US 7443984 B2 20081028; WO 0178298 A1 20011018; WO 0178298 A8 20011227
DOCDB simple family (application)
EP 01917787 A 20010402; AT 01917787 T 20010402; AU 4470901 A 20010402; CN 01801600 A 20010402; DE 60126874 T 20010402; HK 03103128 A 20030430; JP 0102866 W 20010402; JP 2000179695 A 20000615; KR 20017015690 A 20011206; MX PA01012518 A 20010402; NO 20015908 A 20011203; TW 90108158 A 20010404; US 907602 A 20020415